SCOLYTUS. INSECTS. 303 



Gen. SCOLYTUS, HYLESINUS, CAMPTOCERUS, PHLOIOTRIBUS, TOMICUS, 

 PLATYPUS. 



Gen. SCOLYTUS, Lat. Oliv. 



Body oblong or cylindrical ; head almost globular, and conceal- 

 ed partly in the thorax ; antennae short, of nine joints, the 

 intermediate ones very small, and the ninth forming a solid 

 club, compressed and rounded at the end ; wings large and 

 folded under hard elytra ; exterior angle of the legs forming 

 a hook, and the penult joint of the tarsi bilobed. 



S. destructor, Lat. Oliv. Shining black, with the antennae, feet, and 

 elytra chestnut brown ; upper part of the head furnished with a 

 yellow down ; thorax large ; elytra with six or seven elevated and 

 dotted striae. 2 lines long. Europe Lat. Gen. ii. 279. 

 This species is one of those which are so destructive to wood. The larva is short, 



soft, with six feet and a scaly head, armed with two strong jaws, by means of which 



it gnaws the hardest wood. 



TRIBE II. BOSTRICHINI. 



Antennae with less than eleven joints, terminating in a club ; 

 body ovoid or cylindrical ; maxillary palpi very distinct, fili- 

 form, or thickening towards the end. 



Gen. BOSTRICHUS, PSOA, Cis, NEMOSOHA, CERYLON, RHYZOPHAGUS, 

 CLYPEASTER. 



Gen. BOSTRICHUS, Lat. 



Body cylindrical ; thorax globular, spinous, or dentated at its 

 anterior and superior part ; antennae short, composed of six 

 joints, the last three forming a perfoliated club ; tarsi simple 

 filiform, of four joints. 



The insects of this genus rarely attack living trees ; but are frequently found on 

 dead branches, or under the bark of decayed ones. They are never found on flowers 

 or leaves. 

 B. capucinus, Lat. Black, with the thorax covered with elevated 



points; the elytra and abdomen reddish. Inhabits Europe 

 Lat. Hist. xi. pi, 92, fig. 2. 



TRIBE III. PAUSSILI. 



Body oblong, much flattened, narrowed before ; tarsi with five 

 joints, and all entire; palpi conical; antennae in some of 

 two joints, the last very large, in others of ten, forming a cy- 

 lindrical club and perfoliated at the base ; elytra truncated 

 at the end. 

 Gen. PAUSSUS, CERAPTERUS. 



Gen. PAUSSUS, Lin. 



Antennae of two joints, the last very large, dentated or hooked, 

 almost oval or orbicular ; labrum coriaceous, small and trans- 

 versely square ; palpi four, conical or subulate, short and 

 thick, the maxillaries a little larger than the labial ; labium 

 corneous, almost oval, with a longitudinal carina in the mid- 

 dle ; tarsi short, cylindrical. 



